package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 新增菜品
     *
     * @param dishDTO
     */
    @Override
    @Transactional
    public void dishAdd(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);

        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && !flavors.isEmpty()) {
            dishFlavorMapper.insertBatch(flavors, dishId);
        }
    }

    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult dishList(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

        Page<DishVO> page = dishMapper.dishList(dishPageQueryDTO);

        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 根据id批量删除菜品信息
     *
     * @param ids
     */
    @Override
    public void dishDelete(List<Long> ids) {
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            // 判断当前菜品是否能删除 -- 是否起售
            if (dish.getStatus() == StatusConstant.ENABLE) {
                // 当前菜品出于起售中
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        // 判断当前菜品是否能删除 -- 是否被套餐关联
        List<Long> setmealIdsByDishId = setmealDishMapper.getSetmealIdsByDishId(ids);
        if (setmealIdsByDishId != null && !setmealIdsByDishId.isEmpty()) {
            // 当前套餐被关联
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        // 删除菜品数据
        /*for (Long id : ids) {
            dishMapper.dishDelete(id);
            // 删除口味数据
            dishFlavorMapper.flavorDeleteByDishId(id);
        }*/

        // 优化删除菜品
        dishMapper.dishDeleteByIds(ids);
        dishFlavorMapper.flavorDeleteByDishIds(ids);
    }

    /**
     * 根据id查询菜品和口味
     *
     * @param id
     * @return
     */
    @Override
    public DishVO getDishById(Long id) {


        // 查询菜品数据
        Dish dish = dishMapper.getById(id);

        // 查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        // 将数据封装到VO中
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 修改菜品信息
     *
     * @param dishDTO
     */
    @Override
    public void dishUpdate(DishDTO dishDTO) {
        // 修改菜品基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.update(dish);

        // 删除口味信息
        dishFlavorMapper.flavorDeleteByDishId(dishDTO.getId());

        // 插入口味信息
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && !flavors.isEmpty()) {
            dishFlavorMapper.insertBatch(flavors, dishDTO.getId());
        }
    }

    /**
     * 起售/停售菜品
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .status(status)
                .id(id)
                .build();

        dishMapper.update(dish);
    }

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
